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Last updated date: 10th Dec 2023
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MVSAT Dec 2023

Difference between physical and chemical change?

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Hint: A chemical change is a permanent change and it is irreversible in nature.
A Physical change is a temporary change and it is reversible in nature. It affects only physical properties i.e. shape, size, etc. ..

Complete step by step answer:

Physical changeChemical change
Only physical changes like odour, physical state, density, volume etc. changed and chemical properties remain unchangedThe chemical composition and chemical properties undergo a change
No new substance is formed in a physical change.A new substance is formed in a physical change.
Very little or no energy in the form of heat, light or sound is usually absorbed or given out in a physical changeA chemical change is always accompanied by absorption or evolution of energy
It is a temporary changeIt is a permanent change
The original form of substance can be regained by simple physical methodOriginal substance cannot be obtained by simple physical method
It is reversibleIt is irreversible

Physical changes:

Physical changes only change the appearance of a substance, not its chemical composition. A process that does not cause a substance to become a fundamentally different substance.
Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc
Physical changes only change the appearance of a substance, not its chemical composition.

Chemical changes:
Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions. A process involving the breaking or making of interatomic bonds and the transformation of a substance (or substances) into another. The “ingredients” of a reaction are called reactants, and the end results are called products. A process that causes a substance to change into a new substance with a new chemical formula is known as a chemical reaction .

Note: It is important to understand these basic concepts to build up higher level concepts.
A lot of students get confused here so try to research more about this and not just mugging up definitions.Examples of Physical Changes You See Every Day
An ice cube melting into water in your drink.
Freezing water to make ice cubes.
Boiling water evaporates.
Hot shower water turning to steam
Examples of chemical changes are as follows :-
Burning wood.
Souring milk.
Mixing acid and base.
Digesting food